Closure fastening device



Feb. 18, 1964 D. E. c. WEBSTER CLOSURE FASTENING DEVICE 4 Sheets-Sheet 1Filed Aug. 27, 1962 IN VEN TOR. DESMDND E. C. WEBSTER BY 77M MEWMATTORNEYS Feb. 18, 1964 n. E. c. WEBSTER CLOSURE FASTENING DEVICE FiledAug. 27, 1962 4 Sheets-Sheet 2 INVENTOR.

DESMOND E'.C. mama BY F WM M ATTORN Feb. 18, 1964 c, WEBSTER 3,121,319

CLOSURE FASTENING DEVICE Filed Aug. 27, 1962 4 Sheets-Sheet 3 il'llmlllllL 2 x ETIIIIIIIII l/VVE/VTOH Desmond EC Webs/er Attorneys,1964 D. E. c. WEBSTER 3,121,319

CLOSURE FASTENING DEVICE Filed Aug. 27, 1962 4 Sheets-Sheet 4 FIG 33 FIG32 Desmond E. 6i Websfar 'WWM, MWM

AHOIDGYS United States Patent 3,121,319 CLOSURE FASTENING DEVICE DesmondEdward Charles Webster, 1 St. .l'ohns Mansions, St. .lohns Road, SeaPoint, Cape Town, Cape Province, Republic of South Africa Filed Aug. 27,1962, Ser. No. 219,797 Claims priority, application Great Britain Nov.23, 1959 38 Claims. (Cl. 70-150) This invention relates to fasteningdevices such as lockable latches used on doors, windows and the like ofthe kind having fixed handles and push button means for causingretraction of the latch bolt or the like.

This application is a continuation-impart of applications Serial No.68,900; filed November 14, 1960, now abandoned, and Serial No. 179,574,filed March 14, 1962.

This invention is of particular application on a lockable fasteningdevice of the kind in which a spring biased latch bolt is retracted by atransversely positioned actuating or operating slide and which bolt andslide provide coacting means to cause retraction of the bolt by awedging-like action on forced axial displacement of the slide while, andin which rotatable means are associated with the slide for lockin g thefastening device, rotation of the said means being imparted thereto by akey operated rotatable lock and/ or rotatable push button or like meansprovided on or at the ends of the slide. This type of fastening deviceis received in two intersecting holes bored into the door, one holebeing bored horizontally into the edge face of the door whereas theother is bored at right angles through such door with their axesintersecting and in the same horizontal plane. With said kind offastening device, fixed handles are used which may also serve as guidingmeans for the said slide.

It is an object of this invention to provide a fastening device fordoors of the aforesaid kind which is of robust construction and whichmay be used ondoors in which the swinging edge is at the leftor at theright-hand side and opening inwardly or outwardly without such devicerequiring modifications or alterations.

It is an object of this invention to provide a lockable fastening deviceof the kind indicated which presents security against forcing of thefastening device, when it is locked, by hammering on an end of theslide.

A further object of the invention is to provide fastening devices inwhich the main component parts may remain unchanged and still thefastening devices will be capable of being placed in the non-locking ordead locking conditions (when only the slide is prevented from movingwhile the bolt remains displaceable against its biasing means), or whichis capable of forming an emergency lock such as for use on bathroomswhereby such a door may be unlocked from the outside by a coin, screwdriver or the like non-circular or simple means instead of a key, orwhich is capable of forming a panic lock which is openable without anunlocking action from one side when locked from the opposite side of thedoor.

A still further object resides in the provision of additional andoptional means on such fastening devices whereby the security presentedis increased.

A still further object is to provide key operating means which can beprovided on either side of the door permitting, at any later stage,changing of the key operating means without the latch and locking meansrequiring replacement or alteration of any of the parts.

According to the invention, the fastening device comprises incombination a bolt casing and a spring biased latch bolt slidablymounted within said bolt casing. The end of said bolt within the casinghas at least one arm extending in the axial direction from the end ofsaid latch bolt, and said arm has a projection on the end thereofextending diametrally of said latch bolt and having two converging faceson the side of the projection toward said bolt. A guided actuating slideextends transversely through the casing and adjacent said arm andbetween the latch bolt and the projection, and said actuating slide hasa V-shaped recess in at least one longitudinal side of the slide, saidV-shaped recess having two converging faces with which the convergingfaces of said projection engage for displacing the bolt in the directionof its axis on displacement of the slide in the direction of its ownaxis. The slide has an axial bore therethrough intersecting the V-shapedrecess at a point spaced from the apex thereof, and a rod-like elementis located in the bore of said actuating slide and is rotatable aboutits axis at least through This rod-like element has a portion of reducedcross sectional shape along a part of its length having a dimension atleast in one direction transverse to the length of the rod-like elementno greater than the distance from the end of said projection on saidlatch bolt arm to the bottom of the axial bore in said actuating slide.The reduced cross sectional portion in one rotational position of saidrod-like element allows passage of said projection on said arm past saidrod-like element. There is at least one projection on said rod-likeelement extending in a direction transverse to the length of saidrod-like element and perpendicular to the said one direction which isengageable with a part of said fastening device other than said slide toblock movement of said slide relative to said latch bolt when said rodlike element is in another rotational position 90 from said firstrotational position.

In order that the invention may be clearly understood, reference willnow be made to the accompanying sheets of drawings on which the samereference numerals are used for the same parts of the fastening device.

In the drawings:

FIGURE 1 is a horizontal cross-section through a door fastening deviceaccording to this invention and as fitted in a door;

FIGURE 2 is a cross-section on line IIII of FIG- URE 1;

FIGURE 3 is a cross-section on line III-III of FIGURE 1;

FIGURE 4 is a perspective exploded view of a cylindrical lock barrel ofthe wafer type and the co-acting coupling end of the rod-like elementfor locking of the latch bolt in the extended or retracted position;

FIGURE 5 is an isometric view of the actuating slide for the lock shownin FIGURES l, 2 and 3;

FIGURE 6 is an isometric view of the coacting latch bolt locking rod forlocation in the slide shown in FIGURE 5;

FIGURE 7 is an isometric view of the latch bolt of the lock shown inFIGURES 1, 2 and 3 and for coacting operation with the actuating slideand rod-like element shown in FIGURES 5 and 6 respectively;

FIGURE 8 is an isometric view of a simplified form of actuating slide;

FIGURE 9 is an isometric view of a simplified form of coacting rodlikebolt locking elements for use with the slide shown in FIGURE 8;

FIGURE 10 is a cross-section, drawn to an enlarged scale on line IXIX ofFIGURE 1;

FIGURE 11 is a view similar to FIGURE 10, showing the rod-like elementand associated parts in the alternative position;

FIGURE 12 is a horizontal cross-section through another form of alockable fastening device constructed according to this invention and asfitted in a door;

FIGURE 13 is a horizontal cross-section on line 1313 of the lockingdevice shown in FIGURE 12, not showing the door;

FIGURE 14 is a cross-section on line 14-14 of FIG- URE 12;

FIGURE 15 is a perspective view of the latch bolt; FIGURE 16 is aperspective view of the actuating slide; FIGURE 17 is a perspective viewof the locking rod for the fastening device shown in FIGURES 12, 13 and14 and for use with the parts shown in FIGURES l and 16;

FIGURE 18 is an exploded perspective view of a key operated lockingdevice of a pin tumbler lock type for use with the fastening andcomponent parts shown in FIGURES 12 to 17 and showing the coupling endof the rotatable barrel of such locking device for engagement by the endof the locking rod which is shown fragmentarily;

FIGURE 19 is a sectional elevation of a wafer type key opera-tedrotatable locking device showing one form of construction of the rodcoupling end thereof;

FIGURE 20 is a cross-section on line 202tl of FIGURE 19;

FIGURE 21 is a view similar to FIGURE 19 of the barrel of a pin tumblerlocking device showing a modified form of construction of the couplingend;

FIGURE 22 is a cross-section on line 2"22 of FIG- URE 21;

FIGURE 23 is a view substantially similar to FIG- URES 20 and 22 showingthe shaping of the coupling end of the barrel of a key operated lockingdevice, housed in a non-rotatable casing, for connection to the oppositeend of the locking rod for a fastening device having a key operatedlocking means on both sides of the door;

FIGURE 24 is a fragmentary view of the end of the slide and locking rodfor engaging the coupling ends of the lock barrel and non-rotatablelocking device casing shown in FIGURE 23;

FIGURE 25 shows a modified form of locking rod;

FIGURE 26 shows another modified form of locking roo;

FIGURE 27 shows a further modified form of locking rod coupled to asimple device for unlocking or locking of the fastening device by meansof a simple non-circular element;

FIGURE 28 is a fragmentary plan of a fastening device according to theinvention incorporating the locking rod shown in FIGURE 25;

FIGURE 29 is a cross-section on line 29-29 of FIG- URE 28;

FIGURE 30 is a still further modified form of locking rod;

FIGURE 31 is a fragmentary cross-section substantially similar to FIGURE13 showing a form of fastening device employing a locking rod of thekind shown in FIG- URE 30;

FIGURE 32 is a fragmentary elevation of a form of fixed handle for useon the key lockable and unlockable side of the fastening device shown inFIGURES 12, 13 and 14;

FIGURE 33 is a view similar to FIGURE 32 showing a form of handle foruse on the other side of the fastening device shown in FIGURES 12, 13and 14; and

FIGURE 34 is a plan of a modified form of slide having weakened regionsfor breaking away to form stop abutment faces when the fastening deviceis in the locked position and on application of an excessive impulse onone end of the slide or associated parts.

Referringto the drawings, reference numeral 1 denotes the latch bolt,which also forms the locking bolt for the door fastening device. Thebolt 11, which is of gene-rally cylindrical shape and having the usualcurved or fiat taper 1a on the end projecting from the door, has twoparallel spaced axially arranged extensions or arms 2 extending fromdiametrally opposite positions on the end of the latch, which arms areof reduced width and have on their free ends perpendicular projections 3extending toward each other and which terminate with the ends in spacedrelationship and opposed to one another. The bolt 1 and extensions 2 areslidable within a cylindrical casing and which casing is fitted into ahole-like recess bored ito the side edge of a door 5. One side of thebolt 1 has a fiat surface 6 for slidably engaging a correspondinglyshaped internal surface 7 of the casing 4. The region of the casingopposite to the end from which the bolt 1 projects has a parallel walledcavity 8 therein in which the extensions 2 and perpendicular projeotions3 are guided in sliding fashion. Within the casing 4 is a disc Itextending transversely of the casing and having projections 64 and fillon opposite ends, the projection 64 forming a curved ended detent forengaging a centrally disposed depression 63 provided in an actuatingslide 13 to be described hereinafter. The projection Still forms aretaining pin for a compression spring 11 which is also retained at theopposite end by extension 102 on the bolt I. Said spring normallyretains the bolt 1 resiliently in its outwardly extended position andsimultaneously maintains engagement of the detent forming pro jeotion 64with the slide 13.

The casing 4 also has transverse openings 12 in diametrically opposedsides thereof in which a guided actuating slide 13 for actuating thebolt is transversely located and guided.

In the embodiment of FIGS. 1-7, the actuating slide 13 comprises abar-like member of substantially rectangular cross-sectional shape fromone end of which a tubular extension 19 projects. In the opposite majorfaces 164 of the slide 13 similar V-shaped recesses 15 are provided atcorresponding positions and which recesses both have convergingwall-like faces 16 which converge in the direction of the side edge ofthe door 5 from which the bolt projects. The faces 16 of the recesses 15are engaged by complementary converging faces 16:: on the side ofprojections 3 which face the bolt I.

The slide 13 has an axial bore 163 therethrough which extends throughoutthe length of the slide 13 and which communicates with the bore of thetubular extension 19. In said bore 103 is a rod-like element in the formof a latch bolt locking rod I95. The rod Ill 5 is rotatable in the boreand extends beyond the ends of the slide 13, the one end terminatingwithin the bore of the tubular extension 15?. One end part of the rod165 is of cylin-' drical shape (or other shape which permits it to berotatable in bore 103) whereas the remaining portion 167, forming themajor portion of such rod, has a reduced cross-sectional shape which isformed by removing matetrial from diametrically opposite sides of therod to form two flat surfaces 1%, such reduced part 1437 having athickness equal to or slightly less than the thickness of the materialweb 103 separating the V-shaped recesses 15 in the slide 13. In saidpart N97 a pair of spaced transverse and obliquely located notches 109are provided. The axial bore 1%, at the regions where it opens out ofthe oblique faces 16 of one or both ti-shaped recesses 15 is blocked bya sector shaped piece 110 (see FIGURE 2) which is adapted to be engagedby the notches M 9. Said reduced regions of the bore 163 are engaged bythe flat or reduced part 137 of the rod CW5. Rotation of the rod .165 islimited to movement through an angle of only by said pieces fill. Inorder to lock the bolt 1 in the extended position, rod is turned so thatthe reduced part III? is in a substantially vertical position so that itextends across the V-shaped recesses. The larger dimension of thereduced part 1167 is greater than the distance between the ends ofprojections 3 so that the projections 3 cannot move past the rod part107 and become locked in the converging or apex ends of such recesses.The smaller dimension of the reduced part 167 is less than the distancebetween the ends of projections 3, so that when the faces 1% of the part107 are in line with the faces III of the recesses 15, the bolt is freeto slide when the actuating slide 13 is moved in the direction of itsown axis which is at right angles to the axis of the bolt assembly.

The slide 13 has a depression 63 in the side thereof directed towardsthe bolt 1 for engagement by the detent 64, whereby the sliding movementof the slide 13 is prevented or restrained when the door is slammed shutand the bolt is forcibly displaced inwardly and the reaction force ofthe spring 1 1 on the slide, by means of the disc 10 and detent 64, isincreased.

The rod 105 has, on the cylindrical region to be located immediatelyinwardly of the end 112 of slide 13, two recessed flats 113 arranged atnight angles to one another and which flats are adapted to be engaged bya fiat or slightly curved leaf spring (not shown) which has the endsthereof tightly fitted into cavities 114 provided in the slide 13 andcommunicating with the bore 103. The resilient engagement of the springon either of the flats 113 resists movement of the rod 105 from onealternative position to the other alternative position and in additionresists the withdrawal of the rod 105 from the slide 13. The extreme end115 of rod 105, i.e. the end part extending from end 112 of slide 13, isof non-circular shape as at 116 for non-rotatable engagement in acomplementarily shaped bottom of an axial hole provided in a knob 24.The said knob 24 engages the rod 105 tightly so that the rod rotateswith the knob, while removal of the knob from the rod is prevented.

The knob 24 is of cylindrical shape and has a circumferential flange 117on or near its holed end, whereas the opposite end is preferably dishedas at 118' to form a press button whereby the sliding action can beimparted to the actuating slide 13. Said knob can be fixed to the rod105 by means of a fixing screw or clip which is not shown.

The tubular extension 19 of the slide 13 has the barrel 40 of acylindrical lock engaged therein, and it has two diametrically opposedgrooves 44 for engagement and locking therein of the wafers 43 of thelock barrel. The lock barrel 40, in addition has a further wafter 129(see FIGURES l, 4, 10 and 11) which is not engaged or operated by thekey but which forms a coupling for the connection of the lock barrel 40to the end of the rod 105 projecting into the tubular extension 19. Thewafer 120 in addition serves as a means to ensure that, on insertion ofthe key, the lock barrel 45) can only be rotated in the specificdirection required for movement of the rod to the desired alternateposition, such action being required by the position of the rod 165 inthe slide 13.

The end 121 of rod 105 (FIGURE 6), is halved as at 122 and bevelled asat 123, while inwardly of the halved portion it is provided withconnected notches 124 in two adjacent sides. an axial hole 125 (FIGURES4, 10 and 11) and an arouate extension .126, while within the hole 125and on the extension 126 a corner forming projection 127 is providedwhich has two faces 128 at right angles relative to one another. Thewafer 120 is slidable diametrically in the lock barrel 40 and hasoblique ends 1 29 arranged convergingly relative to one another whilethe effective maximum length of the wafer 120 is the same as thedia-meter of the barrel 40. On one side of the wafer 120, a projection13%] is provided for engagement by a compression spring 131 (FIGURES land 11), located in a recess or hole in the barrel 40 in order to biasthe wafer 120 in one direction for engaging either of two transverseslots 132 (FIGURE in the tubular extension 19. In the center region ofthe wafer, is a rectangular hole 133 in which the end 121 of the rod.105 engages by the reduced region of the rod 105. The wall formingsides of notches 124 engage the faces of the wafer 120 to preventunintentional disengagement of the coupling formed by the rod end 121and the barrel 40.

In either of the alternative positions of the rod 105 within the slide13, one of the faces 106 adjacent the end 121 bears on one of the faces128 of the barrel 40 eccentrically of the axis of the rod, so that whenthe barrel is rotated by a key either of such faces may cause rota- Theinner end of the lock barrel 4t! has tion of the rod so that the rod 105is caused to move to an alternative position. The rotational movement ofthe barrel is controlled by an end of the wafer engaging a slot 132 ofthe tubular extension 1 9 while the oblique ends 129 of the wafer permitrotation of the barrel 40 in the required direction. The depth of thenotches 124 is such that when the rod is in its locking position (FIGURE11) the downwardly directed end of the wafer is operative in a slot 132against the action of its spring.

In the circumferential surface of lock barrel 40 is an arcuate groove135 which extends almost completely around the barrel 4-1). In saidgroove is positioned a coiled compression spring which is engaged at aposition intermediately of its ends and between its convolutions by aprojection (not shown) extending inwardly from the tubular extension 19of the slide, so that the barrel 40 will automatically be returned toits key-receiving position, which is also its locked position. The useof a key is necessary for causing rotation of the rod 105 to its lockedand unlocked positions from the outside of the door. From the inside ofthe door the locking and unlocking is effected by the turning of theknob 24.

The tubular extension 19 has a sleeve 136 therearound. The sleeve 136has a circumferential flange 137 at or near the end adjacent the door.The sleeve 136 and the knob 24 are each slidably located in an annularend 47 of a fixed door. handle 46. In the outwardly directed end of thebore of the annular end 47 a shoulder 138 is provided. In the annularspace between the bores of the handles 46 and the circumferential facesof the sleeve 136 and of the knob 24 are positioned compression springs139 which bear on the shoulders 138 and flanges 137 and 117 to producecentering of the actuating slide 13 while the action of spring 11 isthereby assisted. In fact, with the use of springs 139, a lightcompression spring 11 can be used.

The shoulders 138 could be eliminated and the springs 139 arranged topress on the latch bolt casing 4 and flanges 117 and 137.

In operation, to unlatch the door, axially directed pressure is appliedto either the knob 24 or the lock barrel 40 to cause axial displacementof the slide 13, whereupon the oblique faces effect a wedging anddisplacing action on the projections 3 on the ends of extensions 2 ofbolt 1. Due to this wedging action, the projections 3 slide alongconverging faces 16 to cause retraction of the bolt. For locking of thebolt in the extended position, the rod 105 is rotated either by the knob24 or the lock barrel 40. Rotation of such rod 105 is through an angleof 90 only.

A simplified construction is shown in FIGS. 8 and 9. As seen in FIG. 8,the V-shaped recess 15a extends into the actuating slide 13a from onlyone side, and it will be understood that only one projection 3 will thenbe necessary on the arm 2 on the bolt 1. The reduced portion 107a of thelocking rod 165a is then flattened only on one side, and in thisinstance the minimum dimension of the portion 167a is less than thedistance from the end of projection 3 to the bottom of the bore 10311 inthe slide, while the maximum dimension of the portion 107:: is greaterthan said distance. The other parts of the actuating slide and lockingrod are identical with the embodiment of FIGS. l6 and the operation ofthe locking device With the modified actuating slide and locking rod isalso the same.

In the embodiment of FIGS. 12-17, the lockable fastening device forfitting in a door 151 consists of a latch bolt 152 which is ofsubstantially circular cross-section and which has one flat side face153 and a curved or sloping end 154 which normally projects beyond theside edge 155 of the door 151 for engaging a counting striker platewhich is of a known kind and is not illustrated. Said bolt 152 has twocantilever-like parallel arm-like extensions 156 projecting fromdiametrally opposite points on the end of the bolt opposite to thecurved end 154 thereof. Each extension 156 has a perpendicular whereinsuch slide is also guided.

projection 157 on the free end and which projections 157 extend towardsone another and terminate with the ends in spaced relationship. Saidbolt 152 and the arms 155 are slidable in a casing 158 which in turn ispositioned in a circular hole bored transversely into the side edge 155of the door and which casing is fixed to the door by means of a fixingplate 159 on one end of the casing.

The end of the casing opposite to said fixing plate is closed off andwithin the casing are parallel walls which form grooves 155:: in whichthe bolt arms 155 are slid-ably mounted and guided. In said end regionthe casing 153 has transverse aligned ports 161 and on both sides ofsaid ports 161 and spaced therefrom are bolt holes 162. The actuatingslide 163, described hereinafter, extends through the ports 161 and isslidable therein. The slide 163 preferably has la longitudinal rib 164thereon which is engaged in notch-like recesses 151a provided in theends of the ports 161 and whereby the guiding action of the ports onslide 163 is further assisted and the slide is strengthened.

The actuating slide 163 is of elongated form and of substantiallyrectangular cross-sectional shape having similar V-shaped recesses 165at corresponding positions in the opposite larger faces and havingbetween the re cesses a reduced or web-like region 165. in the slide 163is an axial bore 167 in which a locldng rod 165 is rotatiablypositioned, said bore 157 intersecting the recess or recesses 165provided in the slide 163.

The intermediate region of the locking rod 153 has a reducedcross-section 169, and has a radial projection 17% (see FlGUREl7). Saidreduced cross-section portion 169 of rod 168 lies within the web 155 ofthe slide 153 and has the dimension thereof less than the distancebetween the ends of projections 157 to perm-it retraction of the bolt152 when the slide 153 is actuated or pressure is applied on theprojecting end 154 of the bolt 152, such as when the bolt strikes astriker plate in a door jamb or the like on closing of the door or thelike.

The radial project-ions 17th on the rod 168 extend transversely of therod so that they are engageable with a transversely undisplaceable partof the fastening device assembly, which part in this particular form isthe transverse faces of one of the projections 157 on the arms 155 onbolt 152. The end 171 of the rod is couplable to a coaching end of abarrel 188 of a key operated rotatable locking device 173, whereas theopposite end 172 of the rod has fixed thereto a turnable knob 185 or thebarrel of another key operated locking device, in which case the shapingof such end 172 would be modified, as will be described with referenceto FlGURES 23 and 24.

The said V-shaped recesses 165 have convergingly arranged oblique faces1649 on which faces the faces of projections 157 which are directedtowards the belt 152 are slidably movable for retracting the bolt by awedging action when the said slide 163 is displaced in the direction ofits own axis.

In one form of construction, the rod 168 has a single radial projection1713a (FIGURES and 27) which, in the locking position of the rod, bearsagainst one outside face of the latch bolt casing 158 at a positionabove or below the port 161 by extending through an aperture 134 in theslide 163. When the projection 17 9a is thus engaged, the sliding actionof the slide 163 is stopped in one direction only. Alternatively, theradial projection may be positioned so as to engage an inside face ofcasing 158 as is the projection 1711s of EEGURE 30. Such a radialprojection can be positioned on the rod in such a position that it isadapted to engage a side face of a bolt arm 156 or one of the perpendiular projections 157 as are the projections 17 of FIGURES l2 and 17. Ina further modified form, such a radial projection may be positionedtowards an end of the rod for engagin a part of a fixed handle 175 inwhich the slide 153 slides and Such a radial exten- 8 sion can also bearranged to engage in a cavity or recess provided in the handle 175.

There can also be a plurality of projections on rod 163. An additionalradial projection 1761b can be provided diametrally opposite the radialprojection 176a so that projections abut against two regions of thefastening device assembly which are not capable of transversedisplacement for additional security. The aforesaid radial projectionson the rod 158 block the axial movement of the rod, and consequentlyalso the slide, in one direction only.

Where sliding movement of the slide 163 is to be blocked or locked inboth directions, the rod 158 can be provided with an additionalprojection 1711c or additional projections 1719c and (see FIGURE 27 andFIG- URE 26) in axially spaced relationship relative to projection 179aor projections 17% and 17%. The radial projections 170a and 17190, orprojections 1711a, 1719b and 1713:, 170d, are disposed in spacedrelationship for bearing engagement against the opposite sides of thebolt casing 158, the bolt arms 156 or projections 157.

In a modification of this form of construction, in order to block thesliding movement in both directions, the single radial projection 17leof FIGURES 30 and 31 can be made suiiiciently long to engage opposedinternal surfaces of the bolt casing 158, for example, walls forming theguide groove 158a for the bolt extensions 156. With this arrangement,diametrically opposed projections can also be provided to engageinternal upper and lower parts of the bolt casing. However with sucharrangement and the part 169 of rod 168 having a dimension such that thebolt projections 157 will clear the rod part 169 when the bolt moves,the projection 170, when in the operative position, forms a blockingelement in the path of the projection 157 on latch bolt 152 whereby thelatch bolt as well as the slide becomes locked and prevented from beingretracted, thus providing dead locking.

In the preferred arrangement of the rod, as is shown in FIGURE 17, theradial projection 170 is provided with a central notch 179 which hasfaces 17% for hearing engagement against the sides of a projection 157when the rod is in its position in the slide.

To prevent free rotation of the rod 168, a pair of flat surface formingrecesses 15 2, arranged at right angles to one another, are provided inthe rod which are engaged by a leaf-like spring, detent, spring clip orthe like which in turn is located in a recess 18% provided in the slide163.

In the aforesaid forms of the fastening device, in which the radialprojection or projections on the rod 168 are disposed within the axialbore 167 of the slide 163, the recess or recesses or like cavities 184are provided in the slide 153 through which the radial projection orprojections are adapted to rise when the rod is rotated to the operativeposition, see FIGURE 29. The rotational movement of the rod 158 islimited to 90 and such cavity or cavities 1% term stop means forlimiting the extent of such rotation.

in the preferred arrangement of FIG. 17, the rod 169 has a flattenedcenter region in which notches 174 are provided to clear stop members inthe bore of the slide which prevent axial movement of the rod relativeto the slide and which limit the extent of rotation of the rod 169within the slide 163, as in the embodiment of FIGS. l-7. The centralnotch 179 is of such a limited depth that the part of the rod in thebottom or the notch can pass between projections 157 and can thus permitmovement of the bolt 152. Thus the rod shown in FIGURE 17 is of a kindwhich does not lock the bolt in either the extended or retractedposition. When the r duced intermediate portion of the rod is notrequired for locking the bolt in the extended or retracted position,such rod may be placed in its locking or blocking position before thedoor is placed in the closed position which, however, is not the casewith a locking rod which causes the bolt to become locked in theextended position such as in FIG. 30.

The rod 168 is of generally circular cross-sectional shape havingsubstantially semicircular and/ or flat crosssectional regions atselected positions. The one end part 172 of the rod 163 is preferably ofsemicircular crosssectional shape or is provided with a flatlongitudinal face for engaging in non-rotational fashion in a knob 1 85(which knob also serves as a press button). The opposite end 171 isflattened or rectangular in cross-section and has a deep transversenotch 1'86 adjacent the extreme end for engaging in hook fashion in acomplementarily shaped recess 187 provided in the inwardly directed endof the barrel 188 of a pin or water type rotatable cylindrical keyoperated locking device rotatably and lockab-ly' located in a housing.The housing is received in a tubular end casing part 189* of the slide163. Such a coupling provides for relative rotational movement to anextent of approximately 90 but beyond which limited extent such partsrotate together to the extent permissible by rotational stop means ofthe rod, which is also to an extent of 90.

Where a barrel is used which is capable of satisfactory operation in anyposition, e.g. when inverted, the recess 187 has internally thereof acurved shelf-like region 190 which fits into the transverse notch 186 inrod 168 while adjacent such shelf-like region are formed faces 191 whichbear on the flat faces on the rod end 171 for causing rotation of therod when faces 191 press thereon. Pairs of faces 191 are located atright angles to one another to provide for the said relative rotationalmovement between the barrel and the red as aforementioned. In the caseof a key operated rotatable barrel locking device which is notsatisfactory in operation when inverted, the recess 137a in themodification of FIGURES 21 and 22 opens outwardly in diametricallyopposite sides of the inwardly projecting end of the barrel and adiametrally extending bar 192 is provided, instead of the shelf-likeregion 191, which fits into the transverse notch 186 of the rod 168.This provision is found to be desirable in the case of pin tumbler keyoperated rotatable locking devices. In both forms of construction, therotatable lock part is placed in engagement with the rod by a transversemovement while disengagement in the transverse direction cannot takeplace due to the rotatable key operated lockable part being retained inthe tubular end part 189 of the slide.

In the case of a pin tumbler type of key operated locking device of theknown kind, the housing part thereof is positioned in the tubular endpart 189 of the slide while the face of such locking device forms apressure area on which slide displacing pressure is applied afterunlocking the locking device with the aid of a key.

The tubular end part 189 of the slide is slidable in and guided in atransverse hole 195 of one handle 175. In the other handle 175, a holeis provided in which the knob 185 is slidably guided. The handles 175are preferably fixed by screws or bolts 196 extending through holesprovided in the handle on the inside of the door, through the door,through the spaced holes 162 of casing 158 and into screw threaded holes197 of the handle 175 on the outside of the door. One of the screws 196passes freely between the parallel bolt arms 156.

When a key operated locking device for rotating the rod 168 is requiredon both sides of the door, the end 172 of the rod 168 is provided with aflattened end tip part 199 (FIGURE 24) as well as the transverse notch186. The coacting barrel or cylindrical part 188a of a key operatedlocking device, is provided in the inwardly directed end with acomplementary shaped recess 187a, pairs of internal faces 191 and adiagonally positioned bar 192 into which the said end 172 of the rod isslid in a transverse direction and hooked as with the lock of FIGS. 21and 22. Said lock with its housing is received in a casing 201. Thecasing 201 has a diametrally extending flanged groove 1% for slidingengagement with a complementary shaped end region of the slide for acoupling action. The coupling of the casing 201 to the slide and thecoupling of the rod to the barrel 185a takes place simultaneously.

The casing 291 or tubular end part 189 of the slide 163 are shown to beof ellipse-like shape which prevents rotation of the casing of the lookwhile in addition the widths of the handles may be reduced. Other shapescan be used if desired.

A further feature of the invention resides in the construction of thebolt casing 158 in which at least one shallow transverse projection 193is provided within the guide groove 158a for engaging a shallow recess194 provided in the outwardly directed face of one of the arms 156 ofthe bolt 152 to prevent unintentional or accidental removal of the boltfrom the casing 158. Preferably, projections 193 are provided onopposite sides of the casing 158 and both arms 156 of the bolt areprovided with said recesses 194. Said projections 193 are convenientlyintegral with the casing, and on insertion of the bolt into the casingthe arms 156 are deflected inwardly due to the resilient characteristicsof the material of such arms so that the movement of the bolt will belimited by the spacing of shoulders 198 formed at the end of each recess194. To facilitate the insertion of the bolt into the casing, the endsof the bolt arms 156 are tapered or rounded off as at 203 so that whenthe bolt is forced into the casing the arms are deflected inwardly untilthe projections 193 engage in the recesses 194.

According to a further optional feature, the end 171 of the rod 168 canbe provided with a fixed or uncouplable plug or barrel 205 (see FIGURE27) of a non-locking kind and having a slot 296 or other shaped recessin the transverse face for engagement by a simple key, screw driver,coin, nail file or the like for unlocking. This feature is particularlysuitable for an emergency fastening device such as may be used onbathroom doors, eg in hospitals, or the like which may require readyopening from the outside in case of an emergency.

A still further optional or additional feature resides in the provisionof a slidable latch element on one or both the fixed door handles 175and whereby the slide may be held or locked against movement. Such latchelement conveniently consists of a small slide 207 (FIGURES 14 and 33)slidably retained in a complementarily shaped recess 208 provided in afixed door handle 175 and having its movement resiliently restrained bya leaf spring, spring clip, detent or the like 209. The said latchelement, when placed in an operative position, is adapted to engage arecess, hole, slit or transverse groove 216 in the knob 185. However,such latch element engaging recess or the like can also be provided inthe slide or in the tubular end 189 of the slide 163. By the provisionof such a latch element, the fastening device according to the inventionmay be readily locked without the aid of key means from one or bothsides of the door so that unlocking cannot be effected with the aid of akey or on turning of the knob on the opposite end of the slide. When itis required to engage and lock the knob 135, the locking action of thelatch element 297 takes place when the knob 185 is turned to positionthe rod 168 in the locking or block ing position so that unlockingcannot take place from either side of the door unless such latch elementhas been manually retracted to its inoperative position.

As indicated above, said latch element may also be provided on the keyoperated lock element of the slide, in which case such element engages acavity provided in the tubular part 189 of the slide 163.

This additional feature provides for additional security, such as wherea door is situated on a passage and it is required, should anyone breakinto the room, that such person be confined to that room by beingincapable of unlocking the lock to enter the passage.

It will be obvious that instead of the tubular end part 1. l 189 on theslide a knob may be provided where the fastening device does not requirekey operated locking means.

As with the embodiment of FiGS. 1-7, the slide is normally retained inits centralised position by means of compression springs 21} encirclingregions of the slide and adapted to press on exterior side faces of thebolt casing 153 around the ports 161 and also bearing on shoulders 21?.on the slide, the knob 185 or the casing Zill. One of the springs 21%,when in position maintains the coupling between casing 281 and theslide. The knob 185 is conveniently fixed on the rod end 169 by a setscrew 212. The bolt 152; is resiliently biassed to the extended positionby a light s ring 2-33 which has one end located in a recess 214provided in the bolt 152 whereas the other end of the spring is locatedin a shoulder forming recess 215 provided in an intermediate part of thecasing 158 and more particularly at the position where the interior ofsuch casing 1555 reduces to form the guide groove 158a. Said recess 214opens outwardly in a transverse direction to facilitate the placing inposition of the spring 213.

By positioning the bolts 1% so that they pass through the spaced holes162 of the bolt casing 158, correct alignment of the handles and slidewith the ports 161 is ensured should the hold extending transverselythrough the door not be perpendicular to the door faces and the axis ofthe bolt casing receiving hole.

According to a still further modificaction of the invention, recesses223 (see FIGURE 34) are provided on either side of the apex of theV-shaped recesses 165 to provide weakened regions on the slide. Shouldan end of the slide be hammered in an attempt to force the lock, theseregions can break away when the material of the walls between therecesses res and 22d collapses and a perpendicular face will thus beformed for engaging the arms 156 and projections 15'? of the bolt, thusmaking it entirely impossible to retract the latch bolt withouthammering the entire fastening device out of the door.

The locks described with reference to the drawings are operative fromboth sides of the door. Such locks can be readily constructed foroperation from one side of the door only such as for use on cupboarddoors or the like. With such a modification of the invention and when akey operated lock is required, the rod ill-5 or Maia terminates at theend 112 of t e slide 13 or 13a, while knob 24; and associated spring139, and also the handle 46 will not be required (see FIGURES 16). if alock of this kind is not required to be of a key operated kind, thecylindrical extension 19 and the cylindrical lock barrel 40 are notprovided. in both these cases, the V-shaped notch or notches 15 providea stop forming transverse wall to limit the motion of the slide in onedirection while only one spring 139 would be used.

The lock according to this invention may be used in doors of differentthicknesses (Within limits) without requiring modification orubstitution of different sized parts. Furthermore, the lock accordng tothis invention is easily assembled and the possibility of incorrectassembly avoided.

The fastening device according to this invention fits all hands of doorswithout requiring substitution of parts or dismantling to turn parts tosuit the swing of the door. In addition, the lock according to thisinvention is made up of a small number of parts to keep themanufacturing costs down to a minimum. The lock according to thisinvention also provides a fastening device which, if the key is lost, isnot useless as it can still be locked from the inside of a room by theturning of the knob 24 to the locking position.

It will of course be understood that the parts of the variousmodifications can, with changes which will be obvious from the foregoingdescription, be substituted for similar parts in other modifications,and the various modifications can be simplified by the elimination ofnonessential parts, such modifications and simplifications being withinthe scope of the invention as defined in the claims appended hereto.

l claim:

1. A fastening device for doors and tie like, comprising in combinationa bolt casing, a spring biassed latch bolt slidably mounted within saidbolt casing, the end of said bolt within t e casing having at least onearm extending in the axial direction from the end of said latch bolt,said arm having a projection on the end thereof extending diametrally ofsaid latch bolt and having two converging faces on the side of theprojection toward said bolt, a guided actuating slide extendingtransversely through the casing and adjacent said arm and between thelatch bolt and the projection, said actuating slide having a V-shapedrecess in at least one longitudinal side of the slide, said V-shapedrecess having two converging faces with which the converging faces ofsaid projection engage for displacing the bolt in the direction of itsaxis on displacement of the slide in the direction of its own axis, saidslide having an axial bore therethrough intersecting the ti-shapedrecess at a point spaced from the apex thereof, a rod-like elementlocated in the bore of said actuating slide and ro tatable about itsaxis at least through said rod-like element having a portion of reducedcross-sectional shape along a part of its length having a dimension atleast in one direction transverse to the length of the rod-like elementno greater than the distance from the end of said projection on saidlatch bol arm to the bottom of the axial bore in said actuating slide,said reduced cross-sectional portion in one rotational position of saidrod-like element allowing passage of said projection on said arm pastsaid rod-like element, and at least one projection on said rod-likeelement extending in a direction transverse to the length of saidrod-like element and perpendicular to the said one direction andengageab-le with a part of said fastening device other than said slideto block movement of said slide relative to said latch bolt when saidred like element is in another rotational position 90 from said firstrotational position.

2. A fastening device for doors and the like, comprising in combinationa bolt casing, a spring biassed latch bolt slidably mounted within saidbolt casing, the end of said bolt within the casing having a pair ofparallel arms extending in the axial direction from diametricallyopposite positions on the end of said latch bolt, each of said armshaving a projection on the end thereof, said projections extendingtoward each other and having the ends spaced from and opposed to eachother, at least one of said projections having two converging faces onthe side of the projection toward the bolt, a guided actuating slideextending transversely through the casing and through the space betweensaid arms and between the latch bolt and the projections, said actuatingslide having a V-shaped recess in at least one longitudinal side of theslide, said V-shaped recess having two converging faces with which theconverging faces of said at least one projection engage for displacingthe bolt in the direction of its axis on displacement of the slide inthe direct-ion of its own axis, said slide having an axial boretherethrough intersecting the V-shaped recess at a point spaced from theapex thereof, a rod-like element located in the bore of the actuslideand rotatable about its axis at least through 90, said rod-like elementhaving a portion of reduced cross sectional shape along a part of itslength having a dimension at least in one direction transverse to thelength of the rod-like element no greater than the distance between thespaced opposed ends of said projections, said reduced cross-sectionalportion in one rotational position of said rod-like element allowingpassage of said projections on said arms past said rod-like element, andat least one projection on said rod-like element extending in adirection transverse to the length of said rod-like element andperpendicular to the said one direction and engageable with a part ofsaid fastening device other than said t slide to block movement of saidslide relative to said latch bolt when said rod-like element is inanother rotational position 90 from said first rotational position.

3. A fastening device for doors and the like comprising in combination abolt casing, a spring biassed latch bolt slidably mounted within saidbolt casing, the end of said bolt within the casing having a pair ofparallel arms extending in the axial direction from diametricallyopposite positions on the said end of said latch bolt, each of said armshaving a projection on the end thereof, said projections extendingtoward each other and having the ends spaced from and opposed to eachother, at least one of said projections having two converging faces onthe side of the projection toward the bolt, a guided actuating slideextending transversely through the casin g and through the space betweensaid arms and between the latch bolt and the projections, said actuatingslide having a V-slraped recess in one longitudinal side of the slide,said V-shaped recess having two converging faces with which theconverging faces of said at least one projection engage for displacingthe bolt in the direction of its axis on displacement of the slide thedirection of its own axis, said slide having an axial bore therethroughintersecting the V-shaped recess at a point spaced from the apexthereof, a rod-like element located in the bore of the actuating slideand rotatable about its axis at least through 90, said rod-like elementhaving a portion of reduced crosssectio-nal shape along a part of itslength with a dimension in one direction transverse to the length ofsaid rodlike element no greater than the distance between the spacedopposed ends of said projections and having a dimension in the directionperpendicular to said one direction and transverse to the length of saidrod-like element greater than the distance between the opposed ends ofsaid projections, whereby the rod-like element can be rotated to placeit in either of two altemative positions, in one alternative posit-ionpreventing movement of said one projection along the surfaces of saidV-shaped recess and in the other position permitting movement of saidone projection along the surfaces of said V-shaped recess.

4. The combination as claimed in claim 3 in which said portion of saidrod-like element having the reduced cross-sectional shape is solid inthe central portion of the length thereof, and in one alternativeposition preventing passage of said projections past said portion ofsaid rod-like e ement and in the other position permitting passage ofsaid projections past said rod-like element.

5. The combination as claimed in claim 3 in which said portion of saidrod-like element having the reduced crosssectional shape is centrallynotched with the notches having a dimension along the rod-like memberslightly greater than the thickness of said projections transversely ofthe arms on said latch bolt, the notches being on opposite sides of saidrod-like element in positions opposed to each other and extending intosaid rod-like element to reduce the greater dimension thereof to thesame size as the lesser dimension thereof, whereby in one alternativeposition the movement of said one projection along the surfaces of saidV-sh-aped recess is prevented while the projections are free to movepast said rod-like member, and in the other position the one projectionis free to move along the surface of the V-shaped recess while theprojections are free to move past said ro-d'like member.

6. A fastening device as claimed in claim 2 in which said actuatingslide has a tubular extension on one end thereof, said tubular extensionhaving a key operated locking device connected to said rod-like elementand constituting means on one end thereof for rotating the rodlikeelement.

7. A fastening device as claimed in claim 2 in which said actuatingslide has a tubular extension on one end thereof, a key operated lockingdevice in said tubular extension connected to said rod-like element andconstituting means on one end thereof for rotating the rod-like element,said key operated locking device having spring i i means connectedthereto and to said tubular extension for returning said key operatedlocking device to a given position when it is rotated in eitherdirection from said position.

8. A fastening device as claimed in claim 7 in which said key operatedlocking device has a circumferential groove therein and said springmeans comprises a coiled spring in said groove with the ends thereofattached to said key operated locking device, and said tubular extensionhas a projection extending into said groove and engaging the centralportion of said spring to keep it fixed relative to said projection.

9. A fastening device as claimed in claim 2 in which said actuatingslide has a tubular extension on one end thereof, a key operated lockingdevice in said tubular extension and constituting means on one endthereof for rotating the rod-like element, said key operated lockingdevice having a cylindrical recess on the end thereof toward saidrod-like element and at least one projection extending into said recesshaving two surfaces thereon at right angles to each other, said rod-likeelement extending into said cylindrical recess and having a flat surfacethereon engageable by said surfaces on said projection eccentrically ofthe axis of said rod-like element for turning said rod-like element.

10. A fastening device as claimed in claim 2 in which said actuatingslide has a tubular extension on one end thereof, a key opera-tedlocking device in said tubular extension and constituting means on oneend thereof for rotating the rod-like element, said tubular extensionhaving diametrically opposite circumferentially extending slots therein,said key operated locking device having a cylindrical recess in the endthereof toward said rod-like element and having diametrically opposedslots through the walls of said cylindrical recess, a wafer-like elementslidable in said slots in said tubular extension and said key operatedlocking device and having a trapezium shape with the ends inclined atequal angles, the maximum length of said wafer-like element being equalto the inside diameter of said tubular extension, spring meansongageable with said wafer-like element urging it in one direction alongsaid slots in said cylinder lock, and the end of said rod-like elementextending into said cylindrical recess having two faces at substantiallyright angles to each other, each face having a notch therein joining thenotch in the other face, said wafer-like element having an aperturetherethrough through which said end of said rodlike element extend withthe notches engaging around the edges of said aperture, said notchesbeing of different depths for moving said wafer-like element in onedirection or the other against the spring means for engaging the ends ofthe wafenlike element in one or the other of the slots in the tubularextension depending on the position of said rod-like element.

11. A fastening device as claimed in claim 2 and means for applyingpressure to said slide comprising a tubular extension on one end of saidslide, and a knob on the end of said rod-like element at the end of saidslide opposite said tubular extension, said tubular extension and saidknob each having an outwardly projecting flange thereon and a springtherearound with one end against said flange, and a pair of handle meansfor mounting on a door and each having a bore therein into which saidtubular extension and said knob fit respectively, said handle means eachhaving an inwardly extending flange thereon against which said springsbear for centering said slide.

12. A fastening device as claimed in claim 2 and means for applyingpressure to said slide comprising a tubular extension on one end of saidslide, and a knob on the end of said rod-like element at the end of saidslide opposite said tubular extension, said tubular extension and saidknob each having an outwardly projecting flange thereon and a springtherearound with one end against said flange, the other ends of saidsprings bearing against said bolt casing for centering said slide.

13. A fastening device as claimed in claim 2 in which said actuatingslide has a flat spring extending across the bore therethrough, and saidrod-like element has a pair of notches therein adjacent each other inthe peripheral direction of said rod-like element, said notches each having a flat bottom which is perpendicular to the flat bottom of the othernotch, and in which notches said spring engages for retaining saidrod-like element in one of two positions against unintentional movementfrom said position.

14. A fastening device as claimed in claim 2 in which said actuatingslide is substantially rectangular in crossseiion at least in thecentral portion thereof, and said V-shaped recess extends from one wideface of said slide.

15. A fastening device as claimed in claim 14 in which said V-shapedrecess extends completely through said slide from one wide face to theother, and a web is provided at the center of said slide, said webhaving an apert-ure therethrough aligned with said bore in said slide.

16. A fastening device as claimed in claim 15 in which said ll-shapedrecess extends only part way.

17. A fastening device as claimed in claim 2 in which the rod-likeelement has a knob coupled to one end there- 01, said knob having anon-circular cross-sectional shape.

18. A fastening device as claimed in claim 2 in which the rod-likeelement has a knob coupled to one end thereof and a key operated lockingdevice coupled to the other end thereof.

19. A fastening device as claimed in claim 2 in which the rod-likeelement has a key operated locking device coupled to each end thereof.

20. A fastening device as claimed in claim 2 in which the rod-likeelement has a knob coupled to each end thereof.

21. A fastening device as claimed in claim 2 in which the rod-likeelement has an operating means at only one end thereof, said operatingmeans being taken from the group consisting of a keyoperated lockingdevice and a knob.

22. A fastening device as claimed in claim 2 in which said actuatingslide has a rib along one edge thereof, said bolt casing havingdiarnetrally opposite ports through which said actuating slide passes,said ports each having a notch in the edge thereof in which saidlongitudinal rib is engaged for guiding and locating said slide relativeto said bolt casing.

23. A fastening device as claimed in claim 2 in which one end of saidrod-like element has a. reduced crosssec-tion and has a flattened shapeand has a transverse notch adjacent said one end, and said fasteningdevice further comp-rises a rod rotating means having a recess in oneend thereof and a transverse part in said recess engaged by the notch inthe said one end of said rod-like element for coupling said rod-likeelement and said rotating means for rotation together when said rotatingmeans is rotated and for rotation of said rod-like element while saidrotating means remains fixed when the rod-like element is rotated fromthe other end, said rotating means having a groove therein extendingparallel to the axis for enabling the rod-like element to be insertedinto the recess and engaged with said transverse part.

24. A fastening device as claimed in claim 2 in which said bolt casinghas at least one inwardly extending projection therein and one of saidarms on said bolt has a shallow recess on the surface thereof opposed tosaid mwardly extending projection, whereby the movement f (the bolt islimited by the abutment of the inwardly extending projection on the boltcasing with the ends of the recess on the arm.

25. A fastening device as claimed in claim 24 in which said bolt casinghas parallel walls therein. in the end remote from the end from whichthe bolt projects, said parallel walls guiding said arms on said bolt,said inwardly extending projection on the bolt casing extending into thespace between said parallel walls, and a furthr in 41 lo wardlyextending projection on said bolt casing diametrally opposite said firstmentioned projection, and the other of said arms also having a shallowrecess therein in which said further projection engages.

26. A fastening device as claimed in claim 2 which further comprises anon-locking barrel-like rotatable part engaged with one end of saidrod-like element and hearing on said slide, said rotatable part having anon-circular depression in the face remote from the end engaged withsaid rodlike element, said depression being for engagement by anoncirc-ular tool for turning the rotatable part to turn said rod-likeelement.

27. A fastening device as claimed in claim 2 which further comprises atleast one door handle adapted to be secured to one side of a door andhaving an aperture therethrough in which said slide and locking rod areguided, and a slidaole latch element on said door handle movable towardand away from said slide and locking rod and engageable therewith forlocking said slide against movement in an axial direction.

28. A fastening device as claimed in claim 2 which further comprises apair of door handles adapted to be mounted on opposite sides of a doorand having aligned acertnres through which said slide and rod-like elemnt me guided, one of said handles having spaced parallel holes extendingparallel to said apertures and the other of handles having tapped holesaligned with said spaced parallel holes in the one handle, and a pair ofscrew lihe securing elements extending through said spaced parallelholes, through said bolt casing and into said tapped holes, one of saidsecuring elements passing between said arms on said colt.

29. A fastening device as claimed in claim 2 in which said slide hasfurther recesses therein adjacent the apex of said i-shaped recess forforming a weakened portion of said slide, whereby when excessiveimpulses are plied to the ends of said slide in attempt to force thefastening device, the weakened portion of the slide will break andtransverse face-s will be formed which will abut against saidprojections on said arms on said bolt to prevent movement of said slide.

30. A fastening device for doors and the like, comprising in combinationa bolt casing, a spring oi-assed latch bolt slidahly mounted within saidbolt ca ing, the end or" said bolt wi tin the casing having a pair ofparallel arms extending in the axial direction from diametricallyopposite positions on the end of said latch bolt, each of said armshaving a projection on the end thereof, said projections extendingtoward each other and having the ends spaced "from and opposed to eachother, at least one of said projections having two converging faces onthe side of the projection toward the bolt, a guided actuating slideextending transversely through the casing and through the space betweensaid arms and between the latch bolt and the projections, said actuatingslide having at least a central portion with a cross-sectional shapewith a di ..cnsion one direction. transverse to the axis of the slidewhich is greater than the dimension perpendicular to said one directionand transverse to the axis of the slide, said actuating slide having aV-shaped recess in at least one longitudinal side of the slide, saidV-sha ed recess having two conveuging faces with which the convergingfaces of said at least one projection engage for displacing the bolt inthe direction of its axis on displacement of the slide in the directionof its own axis, said slide having an axial bore therethroughintersecting the t -shaped recess at a point spaced from the apexthereof, a rod like element located in the bore of the actuating slideand rotatable about. its axis at least through said rod-like elementhaving a portion of reduced cross-sectional shape along a part of itslength having a dimension at least in one direction transverse to thelength of the rod-like element no greater than the distance between thespaced opposed ends of said projections, said reduced cross-sectionalportion in one rota- 1 7 tional position of said rod-like elementallowing passage of said projection on said arms past said rod-like elenent, and said rod-like element having at least one projection thereonalong the length thereof at a point within said central portion of saidslide and extending transversely of said actuating slide a distancesutficient for engagement with a portion of said fastening device otherthan said slide to block movement of said slide relative to said latchbolt when said rod-like element is in another rotational position 90from said first rotational position.

31. A fastening device as claimed in claim 30 in which there is only asingle projection on said rod-like element.

32. A fastening device as claimed in claim 31 in which said singleprojection is adjacent said arms extending from said bolt when saidrod-like element is positioned in said slide, whereby when said rod-likeelement is rotated thnough 90 said projection will engage one of saidarms and prevent movement of said slide.

33. A fastening device as clairned in claim 31 in which said singleprojection is aligned with said projections on said arms extending fromsaid bolt when said rod-like element is positioned in said slide,whereby when said rod-like element is rotated through 90 said projectionwill block said projections and block movement of said bolt as Well asof said slide.

34. A fastening device as claimed in claim 30 in which there are aplurality of projections, said projections being spaced from each otheralong the length of said rod-like element.

35. A fastening device as claimed in claim 34 in which there are atleast two projections, said projections being spaced from each otheralong the length of said rod-like element a distance equal to thedimension of said boit casing in the direction in which said slidepasses through said casing, whereby when said rod-like element isrotated through 90 said projections will engage against the outside ofsaid bolt casing and block movement of said slide.

36. A fastening device as claimed in claim 34 in which 1.5% there are atleast two projections said projections being spaced from each otheralong the length of said rod-like element a distance slightly less thanthe dimension of said bolt casing in the direction in which said slidepasses through said casing, whereby when said rod-lil e element isrotated through said projections will engage against the inside of saidbolt casing and block movement of said slide.

37. A fastening device as claimed in claim 34 in which there are atleast two projections, and said fastening device further comprises apair of door handles adapted to be mounted on opposite sides of a doorand having aligned apertures through which said slide and rod-likeelement are guided, said handles each having a recess therein engageaible by a projection on said rod-like element, whereby when said rod-likeelement is rotated through 90 said projection will engage in saidrecesses in said door handles and block movement of said slide.

38. A fastening device as claimed in claim 34 in which there are atleast two projections, said projections being spaced from each otheralong said rod-like element a distance only slightly greater than thedimension of said projections on said arms on said bolt in the directionpen pendiculia-r to the axis of said bolt, whereby when said rod-likeelement is rotated through 90 said projections will engage the oppositesides of one of said projections on the arms of said bolt and blockmovement of said slide.

References Cited in the file of this patent UNITED STATES PATENTS980,630 Granger Jan. 3, 1911 2,036,154 Littledale Mar. 31, 19362,960,858 Webster Nov. 22, 1960 FOREIGN PATENTS 843,372 Germany Sept.27, 1954

1. A FASTENING DEVICE FOR DOORS AND THE LIKE, COMPRISING IN COMBINATIONA BOLT CASING, A SPRING BIASSED LATCH BOLT SLIDABLY MOUNTED WITHIN SAIDBOLT CASING, THE END OF SAID BOLT WITHIN THE CASING HAVING AT LEAST ONEARM EXTENDING IN THE AXIAL DIRECTION FROM THE END OF SAID LATCH BOLT,SAID ARM HAVING A PROJECTION ON THE END THEREOF EXTENDING DIAMETRALLY OFSAID LATCH BOLT AND HAVING TWO CONVERGING FACES ON THE SIDE OF THEPROJECTION TOWARD SAID BOLT, A GUIDED ACTUATING SLIDE EXTENDINGTRANSVERSELY THROUGH THE CASING AND ADJACENT SAID ARM AND BETWEEN THELATCH BOLT AND THE PROJECTION, SAID ACTUATING SLIDE HAVING A V-SHAPEDRECESS IN AT LEAST ONE LONGITUDINAL SIDE OF THE SLIDE, SAID V-SHAPEDRECESS HAVING TWO CONVERGING FACES WITH WHICH THE COVERGING FACES OFSAID PROJECTION ENGAGE FOR DISPLACING THE BOLT IN THE DIRECTION OF ITSAXIS ON DISPLACEMENT OF THE SLIDE IN THE DIRECTION OF ITS OWN AXIS, SAIDSLIDE HAVING AN AXIAL BORE THERETHROUGH INTERSECTING THE V-SHAPED RECESSAT A POINT SPACED FROM THE APEX THEREOF, A ROD-LIKE ELEMENT LOCATED INTHE BORE OF SAID ACTUATING SLIDE AND ROTATABLE ABOUT ITS AXIS AT LEASTTHROUGH 90*, SAID ROD-LIKE ELEMENT HAVING A PORTION OF REDUCEDCROSS-SECTIONAL SHAPE ALONG A PART OF ITS LENGTH HAVING A DIMENSION ATLEAST IN ONE DIRECTION TRANSVERSE TO THE LENGTH OF THE ROD-LIKE ELEMENTNO GREATER THAN THE DISTANCE FROM THE END OF SAID PROJECTION ON SAIDLATCH BOLT ARM TO THE BOTTOM OF THE AXIAL BORE IN SAID ACTUATING SLIDE,SAID REDUCED CROSS-SECTIONAL PORTION IN ONE ROTATIONAL POSITION OF SAIDROD-LIKE ELEMENT ALLOWING PASSAGE OF SAID PROJECTION ON SAID ARM PASTSAID ROD-LIKE ELEMENT EXTENDING IN A DIRECTION TRANSVERSE SAID ROD-LIKEELEMENT EXTENDING IN A DIRECTION TRANSVERSE TO THE LENGTH OF SAIDROD-LIKE ELEMENT AND PERPENDICULAR TO THE SAID ONE DIRECTION ANDENGAGEABLE WITH A PART OF SAID FASTENING DEVICE OTHE THAN SAID SLIDE TOBLOCK MOVEMENT OF SAID SLIDE RELATIVE TO SAID LATCH BOLT WHEN SAIDRODLIKE ELEMENT IS IN ANOTHER ROTATIONAL POSITION 90* FROM SAID FIRSTROTATIONAL POSITION.